Displaying 1 result from an estimated 1 matches for "vgpentanol".
2008 Jul 10
0
Slow HVM IO performance with newer kernels
...der HVM
Guests with the newer kernels, so I started some measurements.
DOM-0 is a fully upgraded CentOS 5.2. DOM-U is CentOS 5.0 not upgraded
at all for testing purposes. DOM-U sits on an LVM Volume. No other
services are running. Hardware was freshly rebooted every time.
within DOM-0
dd if=/dev/vgpentanol/lvol2 of=/dev/null bs=1M count=1000
gives 134 MB/s
so thats the bare metal value.
within DOM-U
dd if=/dev/hda of=dev/null bs=1M count 1000
gives
50 MB/s with DOM-0 kernel 2.6.18-53.1.19.el5xen
10 MB/s with DOM-0 kernel 2.6.18-92.1.1.el5xen
10 MB/s with DOM-0 kernel 2.6.18-92.1.6.el5xen
so ther...